Could we code in Natural language once we pass the Turing test?
No.  Humans pass the Turing Test but cannot express themselves with enough precision and little enough ambiguity to code well in English (natural language).  No machine will improve on that until it can greatly improve on human-level clarity in expressing their purpose when programming.

Is it possible to program in natural language?  Yes, I think so.  But it would require superhuman intelligence to anticipate all the possible confusions that might arise when a word is not sufficiently precise or accurate to represent an software activity or mechanism.  This probably would require adopting a rigorous convention in choosing a subset of unambiguous words to form a "natural" programming language (a kind of creole).  Coding consistently using only those words would require discipline that exceeds the ability of most humans, methinks.